TMT Bars undergo thermomechanical treatment.

 

Quenching – Once the hot rolled bars are released from the finished mill, they enter the 'Thermex System' water spray system. The highest quality TMT Steel Bars Manufacturers used Thermex Technology, which rapidly cools the outer core and ensures their ductility. Rapid cooling forms a martensitic rim on the outer core of TMT Rebars, while the core remains hot and austenitic.

This cooling method is referred to as Quenching.

Self Tempering – Once the rebars have been removed from the Thermex Quenching box, the core remains hotter than the surface, allowing heat to flow from the core to the surface, resulting in Tempering of the outer Martensite layer and the formation of 'Tempered Martensite'.

Atmospheric Cooling – As soon as the self-tempering process is complete, the bars will undergo atmospheric cooling. This is performed on a normal-temperature cooling bed. Here, the austenitic core transforms into a ferrite-pearlite structure. Consequently, the final structure consists of a robust outer layer and a ductile centre. This procedure strengthens the material's tensile strength, making it highly ductile and weldable.